Williams Partners Raises Cash Distribution to 86.25 Cents per Unit

TULSA, Okla.--(BUSINESS WIRE)--Williams
Partners L.P. (NYSE: WPZ) today announced that the regular
quarterly cash distribution its unitholders receive has been increased
to $0.8625 per unit.

The board of directors of the partnership's general partner has approved
the quarterly cash distribution, which is payable on Aug. 9, 2013, to
unitholders of record at the close of business on Aug. 2.

The new per-unit amount is an 8.8-percent increase over the
partnership's distribution of $0.7925 per unit that was paid in August
2012. It is also a 1.8-percent increase over the partnership's
first-quarter 2013 distribution of $0.8475 per unit.

Second-Quarter Financial Results

Williams Partners plans to report its second-quarter 2013 financial
results after the market closes on Wednesday, July 31.

The partnership will host a joint Q&A live webcast with Williams on
Thursday, Aug. 1 at 9:30 a.m. EDT. A limited number of phone lines will
be available at (888) 490-2763. International callers should dial (719)
457-2710. A link to the webcast, as well as replays of the webcast in
both streaming and downloadable podcast formats, will be available for
two weeks following the event at www.williams.com
and www.williamslp.com.

This announcement is intended to be a qualified notice to nominees under
Treasury Regulation Section 1.1446-4(b)(4) and (d), with 100 percent of
the partnership's distributions to foreign investors attributable to
income that is effectively connected with a United States trade or
business. Accordingly, the partnership's distributions to foreign
investors are subject to federal income tax withholding at the highest
effective tax rate. Nominees, and not Williams Partners L.P., are
treated as the withholding agents responsible for withholding on the
distributions received by them on behalf of foreign investors.

About Williams Partners L.P. (NYSE: WPZ)

Williams Partners L.P. is a leading diversified master limited
partnership focused on natural gas transportation; gathering, treating,
and processing; storage; natural gas liquid (NGL) fractionation; and oil
transportation. The partnership owns interests in three major interstate
natural gas pipelines that, combined, deliver 14 percent of the natural
gas consumed in the United States. The partnership’s gathering and
processing assets include large-scale operations in the U.S. Rocky
Mountains and both onshore and offshore along the Gulf of Mexico.
Williams (NYSE: WMB) owns approximately 68 percent of Williams Partners,
including the general-partner interest. More information is available at www.williamslp.com,
where the partnership routinely posts important information.

Portions of this document may constitute “forward-looking statements”
as defined by federal law. Although the partnership believes any such
statements are based on reasonable assumptions, there is no assurance
that actual outcomes will not be materially different. Any such
statements are made in reliance on the “safe harbor” protections
provided under the Private Securities Reform Act of 1995. Additional
information about issues that could lead to material changes in
performance is contained in the partnership’s annual reports filed with
the Securities and Exchange Commission.